JP2013060221A - Folding container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding container provided with a flip-up sidewall having higher strength as compared with conventional ones.SOLUTION: A first vertical downward lateral rib 91 and a second vertical downward lateral rib 92 are provided at a deep side of a lower edge recess 40R of a flip-up sidewall 40, and a clearance between the first vertical downward lateral rib 91 and the second vertical downward lateral rib 92 are connected by a plurality of vertical downward longitudinal ribs 93, 96 to reinforce an intermediate part of a second horizontal rib 40D of the flip-up sidewall 40. Accordingly the decrease in strength caused by the division of a first horizontal rib 40E by the lower edge recess 40R is suppressed. Thus, the folding container 10 is provided with the flip-up sidewall 40 having higher strength as compared with conventional ones.

Description

  The present invention includes a pair of jumping side walls and a pair of bent side walls between a bottom base and an upper frame that are vertically opposed to each other, and a pair of the jumping side walls with their upper ends as the center. The present invention relates to a folding container that can be folded inward and then folded into a pair of folded side walls.

  The conventional folding container shown in FIG. 14 includes an outer edge central protrusion (not shown) that protrudes upward from the center of the outer edge below the jumping side wall 2 in the lower surface of the bottom base 1, and the jumping side wall. As shown in FIG. 15, a lower end recess 5 into which the outer edge central protrusion is fitted, a pair of first horizontal ribs 6, 6 divided by the lower end recess 5, and the lower end recess 5 The structure includes a second horizontal rib 7 that traverses the upper end and extends to both sides of the lower end recess 5 (see, for example, Patent Document 1).

JP 2008-137713 (FIGS. 1 and 5)

  However, in the above-described conventional folding container, the strength drop of the jumping side wall 2 due to the gap between the pair of first horizontal ribs 6 and 6 being divided by the lower end recess 5 may be a problem.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a folding container provided with a jumping side wall having higher strength than conventional ones.

  The folding container according to the invention of claim 1 made to achieve the above object has a rectangular parallelepiped box shape as a whole, and between the bottom base constituting the bottom and the upper frame constituting the top, 1 A pair of jumping side walls and a pair of bent side walls are arranged opposite to each other, and the jumping side walls are rotatably connected to the upper frame only at the upper end portion, while the bent side walls have upper and lower end portions. A folding container that is pivotally connected to an upper frame and a bottom base and that can pivot a pair of jumping side walls upward and then fold a pair of folding side walls in two. An outer edge central protrusion that protrudes upward from the center of the outer edge below the jumping side wall of the bottom surface of the bottom base, and a lower end recess that fits the outer edge central protrusion on the lower end of the jumping side wall; , Projecting on the outer surface of the jumping side wall, extending in the lateral direction of the jumping side wall, and divided by the lower end recess In a folding container provided with a pair of first horizontal ribs and second horizontal ribs that project from the outer surface of the jumping side wall and extend across the upper end of the lower end recess and to both sides of the lower end recess, The recess rear surface, which is constituted by a part of the lower surface of the two horizontal ribs and faces downward on the back side of the lower end recess, protrudes downward from the entire edge on the tip side of the second horizontal rib on the back surface of the recess. It is characterized in that one hanging horizontal rib and a second hanging horizontal rib projecting downward from the entire edge of the base end side of the second horizontal rib on the back surface of the recess are formed.

  According to a second aspect of the present invention, in the folding container according to the first aspect, a plurality of hanging vertical ribs protruding from the inner surface of the recess and communicating between the first hanging horizontal rib and the second hanging horizontal rib are provided. It has the characteristics.

  According to a third aspect of the present invention, in the folding container according to the second aspect, of the second horizontal ribs and the second horizontal ribs, which communicate between a pair of adjacent vertical vertical ribs and project from the inner surface of the recess. A first lock member insertion hole formed in a position penetrating the first hanging horizontal rib side from the hanging communication rib, and a second formed through the outer edge central protrusion at a position facing the first locking member insertion hole in the vertical direction. It is characterized in that it includes a lock member insertion hole and a side opening formed on the side surface of the bottom base and opening the lower space of the outer edge central projection sideward.

  According to a fourth aspect of the present invention, in the folding container according to the second or third aspect, the vertical droop ribs are respectively disposed between both ends in the horizontal direction of the first droop horizontal rib and the second droop horizontal rib. A pair of horizontal reinforcing ribs extending from the lower end of the vertical rib to both sides of the lower end recess are characterized in that they are integrally formed on the outer surface of the jumping side wall.

  According to a fifth aspect of the present invention, in the folding container according to the fourth aspect, a pair of engagement chambers sandwiched between the first horizontal rib and the horizontal reinforcing rib are communicated with the lower end concave portion on both sides of the lower end concave portion. The pair of engaging protrusions protruding from the outer edge central protrusion on both sides can be accommodated in the pair of engaging chambers, and the inner surface of the pair of engaging chambers and the pair of engaging protrusions, It has a feature in that concave and convex engaging portions that can engage with each other are provided.

[Invention of Claim 1]
In the folding container according to claim 1, the first horizontal rib is formed in the lower end recessed portion by providing the first hanging horizontal rib and the second hanging horizontal rib on the back side of the lower end recessed portion to reinforce the intermediate portion of the second horizontal rib. It is possible to obtain a folding container provided with a jumping side wall having a higher strength than the conventional one by suppressing the strength reduction due to being divided by the above.

[Invention of claim 2]
In the folding container according to the second aspect, since the first hanging horizontal rib and the second hanging horizontal rib are communicated with each other by the plurality of hanging vertical ribs, the reinforcement of the intermediate portion of the second horizontal rib is further strengthened.

[Invention of claim 3]
In the folding container according to the third aspect, since the pair of hanging vertical ribs communicate with each other by the hanging connecting ribs protruding from the inner surface of the recess, the reinforcement of the intermediate portion of the second horizontal rib is further strengthened. Further, by passing the binding band through the first and second lock member insertion holes of the jumping side wall and pulling out from the side opening to the side and binding, the jumping side wall can be firmly held in an upright state. At this time, the binding band is bent by passing the tip through the first lock member insertion hole and slidingly contacting the hanging communication rib from obliquely above, and can be easily pulled out from the side opening, thereby attaching the binding band. Work can be done easily. In addition to the binding band, a lock member such as a pin may be inserted into the first and second lock member insertion holes.

[Invention of claim 4]
The folding container according to claim 4, wherein the first hanging horizontal rib and the second hanging rib are formed by a pair of horizontal reinforcing ribs extending laterally from the hanging vertical ribs at both ends of the first hanging horizontal rib and the second hanging horizontal rib. The strength of the jumping side wall is increased by integrating the lateral ribs and both lateral portions thereof.

[Invention of claim 5]
In the folding container according to claim 5, the pair of engaging protrusions protruding from both sides of the outer edge central protrusion are accommodated in the pair of engaging chambers on both sides of the lower end recess, By engaging the concavo-convex engaging portions provided in the locking projection piece, the jumping side wall is held in an upright state.

The perspective view of the folding container which concerns on one Embodiment of this invention (A) Top side perspective view of upper frame, (B) Bottom side perspective view of upper frame (A) Top side perspective view of bottom base, (B) Bottom side perspective view of bottom base (A) Partially enlarged perspective view on the upper surface side of the bottom base, (B) Partially enlarged perspective view on the lower surface side of the bottom base. (A) Outer side perspective view of jumping side wall, (B) Inner side perspective view of jumping side wall (A) Partially enlarged perspective view of the outer side of the jumping side wall, (B) Partially enlarged perspective view of the inner side of the jumping side wall The perspective view which looked at the jumping side wall from the lower surface side Broken perspective view of folded container in assembled state Broken perspective view of lower end recess and outer edge center protrusion Breaking perspective view in a state in which the locking protrusion is accommodated in the engagement chamber Broken perspective view in a state where the engagement recess and the engagement protrusion are engaged Perspective view of a folding container with the rotating lid fully open Perspective view of the folded container in the folded state Perspective view of a conventional folding container The perspective view of the jumping side wall which the conventional folding container has

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the folding container 10 of the present embodiment is a resin molded product having a rectangular parallelepiped box shape as a whole, and includes a bottom base 11 constituting the bottom and an upper frame 20 constituting the top. A pair of bent side walls 30, 30 and jumping side walls 40, 40 are assembled, and a pair of upper surface lids 50, 50 are assembled on the upper surface of the upper frame 20. Yes.

  As shown in FIG. 2A, the upper frame 20 has a rectangular frame shape. Lid rotation support portions 20E and 20E are formed on the upper surface of the pair of long side portions of the upper frame 20, and an upper surface lid 50 (see FIGS. 1 and 12) is rotated around each of the lid rotation support portions 20E. It is linked movably. Further, a total of four upper surface protrusions 22 are formed on the upper surface of the pair of short sides of the upper frame 20 in pairs, and the upper surface protrusions 22 are formed on the upper surface lid 50 as shown in FIG. It passes through the engagement hole 51 formed so as to penetrate and projects upward from the upper surface lid 50. Further, as shown in FIG. 2A, a closing hole 24 is formed in the center in the longitudinal direction on the inner surface of the pair of short sides of the upper frame 20, and the locking is assembled to each upper surface lid 50. By sliding the slider 60 (see FIG. 1) and engaging with the closing hole 24, the upper surface lid 50 can be held in the closed state.

  Each upper surface lid 50 is an integrally molded product of an opaque resin frame member 50H that constitutes the entire outer edge portion thereof, and a colorless and transparent resin window plate member 50G that closes the inner opening of the frame member 50H. It has become.

  As shown in FIG. 2 (B), both the long side portion and the short side portion of the upper frame 20 have a groove structure in which the cross-sectional shape is opened downward. The outer frame side wall 20A and the inner frame side wall 20B that are opposed to each other with the groove opening sandwiched in the groove shape structure are such that the outer frame side wall 20A extends longer than the inner frame side wall 20B and the inner frame side wall in the short side portion of the upper frame 20 The lower end of 20B is located above the lower end of the inner frame side wall 20B in the long side portion. The long side rotation support portions 20D and 20D are formed on the inner surface of the lower end portion of the outer frame side wall 20A in the long side portion of the upper frame 20, while the outer frame side wall 20A in the pair of short side portions of the upper frame 20 is formed. The short-side rotation support portions 20C and 20C are formed on the inner surface of the, and the short-side rotation support portion 20C is disposed above the long-side rotation support portion 20D.

  As shown in FIG. 3A, the bottom base 11 has the same rectangular shape as that of the upper frame 20, and the bottom surface surrounding wall 11S protrudes from the entire outer edge of the upper surface to form a tray shape. Further, as shown in FIG. 3B, lattice ribs 11 </ b> L are formed on the bottom surface of the bottom base 11 so as to protrude from the entire surface excluding the outer edge portion. Furthermore, at the outer edge corner portion of the bottom base 11 where the lower surface and the side surface intersect, finger-hanging recesses 13 are recessed and formed at two positions near both ends of each long side portion and at the center position of each short side portion. ing. The finger-hanging recesses 13 are open downward and sideward, and when a plurality of folding containers 10 are stacked, the upper and lower folding containers 10, 10 are connected to each other from the side openings 13 </ b> W (see FIG. 10) of the finger-holding recesses 13. A space for inserting a finger in between is formed.

  As shown in FIG. 3A, a long side rotation support portion 11D is provided inside a pair of long side portions of the bottom surface surrounding wall 11S. On the other hand, on the inner side of the pair of short sides of the bottom surface surrounding wall 11S, an outer edge central protrusion 11R is provided at the center, and a pair of square protrusions 11M and 11M are provided at two positions closer to the center. A pair of engaging recesses 11Z and 11Z are provided at both ends.

  The rectangular protrusion 11M has a rectangular parallelepiped shape as a whole as shown in FIG. Further, the engaging recess 11Z is formed to be depressed on the upper surface of the flat protrusion 11X which is lower than the rectangular protrusion 11M. Further, the outer edge central protrusion 11R has a rectangular parallelepiped housing structure extending along the outer edge of the bottom base 11, and the inner space of the outer edge central protrusion 11R has a bottom portion as shown in FIG. It opens to the lower surface side of the base 11 and becomes a part of the finger hanging recess 13. That is, the finger-hanging recess 13 and the outer edge central protrusion 11R are in a positional relationship with each other. Specifically, as shown in FIG. 4A, the outer edge central protrusion 11R includes a first side wall 19A that stands upright from the bottom surface of the bottom base 11, an upper end portion of the first side wall 19A, and an upper end of the bottom surface surrounding wall 11S. From the upper wall 19B that is horizontally placed between the close position and the second side wall 19C that closes the rectangular opening surrounded by the first side wall 19A and the bottom wall 11S of the upper wall 19B. Become.

  As shown in FIG. 4B, a reinforcing projection 19D protrudes downward in a stepped manner at the center in the longitudinal direction of the lower surface of the upper wall 19B, and has a square cross section at the center of the reinforcing projection 19D. A second lock member insertion hole 14 is formed through. Further, as shown in FIG. 9, a pair of facing surfaces 14N and 14N facing each other in the short direction of the outer edge central protrusion 11R in the second lock member insertion hole 14 are inclined so as to approach each other as they go downward. doing.

  As shown in FIG. 4 (A), the locking protrusions 11K and 11K protrude laterally from the positions near the upper end on both end faces in the longitudinal direction of the outer edge central protrusion 11R. In the bottom surface of the bottom base 11, die-cutting holes 11 </ b> W and 11 </ b> W for forming the lower surface of the locking protrusion 11 </ b> K with a mold are formed at positions facing the locking protrusions 11 </ b> K and 11 </ b> K. . As shown in FIGS. 4B and 10, a lower surface recess 11 </ b> Y (corresponding to the “concave engagement portion” of the present invention) is formed in the lower surface of the locking protrusion 11 </ b> K. As shown in FIGS. 4A and 10, an inclined surface 11 </ b> V is formed on the edge of the lower surface of the locking protrusion 11 </ b> K on the side away from the bottom surface surrounding wall 11 </ b> S.

  As shown in FIG. 1, the bent side wall 30 is divided into an upper bent side wall 31 and a lower bent side wall 32 by a central intermediate hinge 33, and the upper end of the upper bent side wall 31 is the length of the upper frame 20. While being rotatably connected to the side rotation support portion 20D (see FIG. 2B), the lower end of the lower bent side wall 32 is the long side rotation support portion 11D of the bottom base 11 (FIG. 3). (Refer to (A)). And in the standing posture in which the upper and lower bent side walls 31 and 32 are both upright, and the folded posture in which the upper and lower bent side walls 31 and 32 are folded inward by overlapping the outer surfaces. Can be changed. Further, side hooks 34 protrude from both side portions of the upper and lower bent side walls 31, 32 toward the jumping side wall 40. The side hook 34 has a hook shape that protrudes from the left and right ends of the upper and lower bent side walls 31, 32 to the back surface side, and the front end of the side hook 34 is bent toward the jumping side wall 40 (not shown). .

  A pair of holder fixing projections 35 and 35 similar to holder fixing portions 43 and 43 of the jumping side wall 40 described later are provided at a position near the lower end of the outer surface of the lower bent side wall 32. Further, the upper bent side wall 31 is integrally formed of an opaque resin frame member 31H constituting the entire outer edge portion thereof and a colorless and transparent resin window plate member 31G which closes the inner opening of the frame member 31H. It is a product. Similarly, the lower bent side wall 32 is an integrally molded product of the frame member 32H and the window plate member 32G.

  As shown in FIG. 5A, the jumping side wall 40 has a structure in which, for example, a rib is provided on a flat main plate portion 49 that is substantially square as a whole and is reinforced. Specifically, a pair of first bulging protrusions 41 and 41 are formed on the jumping side wall 40 by bulging both side edge portions of the main plate portion 49 outward from the lower end portion toward the upper end position. Next to the first bulging protrusions 41, 41, a part of the main plate portion 49 is bulged in the same manner as the first bulging protrusion 41, and the first bulging protrusions 41, 41 are formed. Second bulging protrusions 42, 42 are formed that extend in the vertical direction with the same length. In addition, corner connecting portions 45 and 45 are formed at two positions in the vertical direction of the first bulging protrusions 41 and 41, respectively. Each corner connecting portion 45 dents part of the first bulging protrusion 41 that is on both sides of the jumping side wall 40 from the outside, and protrudes the connecting piece 45T from the back surface of the recessed portion. The side hooks 34 of the bent side walls 30 are engaged with each other.

  The jumping side wall 40 includes a first horizontal rib 40E, a second horizontal rib 40D, a third horizontal rib 40J, and a fourth horizontal rib 40F in order from the lower end side. Specifically, as shown in FIG. 5A, the fourth horizontal rib 40F extends across the entire left and right direction of the jumping side wall 40 at a position near the upper end of the outer surface of the jumping side wall 40, and the fourth horizontal rib 40F The upper part of the rib 40 </ b> F is an upper end connecting part 47. And this upper end connection part 47 couple | bonds with the short side rotation support part 20C of the upper frame 20, and between the raising attitude | position with respect to the bottom base 11, and the folding attitude | position folded by the inner side To rotate. In addition, a finger hood 44 is provided in the upper center of the jumping side wall 40 so as to be adjacent to the lower surface of the fourth horizontal rib 40F.

  As shown in FIG. 5A, the third horizontal ribs 40 </ b> J are provided in pairs on both sides of the finger hood 44 on the outer surface of the jumping side wall 40. The pair of third horizontal ribs 40J and 40J extend horizontally so as to approach each other from the side surface of the jumping side wall 40, and extend obliquely upward from the middle to be connected to the lower surface of the fourth horizontal rib 40F.

  The second horizontal rib 40 </ b> D is disposed near the lower end of the outer surface of the jumping side wall 40 and extends over the entire left and right direction of the jumping side wall 40. The first horizontal rib 40 </ b> E is disposed at the lowermost end of the jumping side wall 40 and is formed over the whole of the horizontal direction of the jumping side wall 40 except for the lower-end recess 40 </ b> R described below. The portions of the second horizontal rib 40D that intersect with the first and second bulging protrusions 41 and 42 are the first and second portions on the inner surface of the jumping side wall 40 as shown in FIG. The groove-like depressions on the back side of the bulging protrusions 41 and 42 are crossed. In addition, a plurality of in-groove ribs 40 </ b> P crossing the groove-like depressions on the back side of the first bulging protrusion 41 are provided on the upper side of the second horizontal rib 40 </ b> D.

  As shown in FIG. 5A, at the center in the lateral direction of the jumping side wall 40, the lower end recess 40R is formed by cutting the main plate portion 49 into a horizontally long rectangle below the second horizontal rib 40D. Yes. And the center part of 2nd horizontal rib 40D crosses the upper end part of the lower end recessed part 40R, and comprises the recessed part back surface 40X (refer FIG. 7) of the back side of the lower end recessed part 40R.

  As shown in FIG. 7, the first hanging lateral rib 91 projects downward from the entire edge on the distal end side of the jumping side wall 40 in the recess back surface 40X, and the base end side of the jumping side wall 40 in the recess back surface 40X. A second hanging horizontal rib 92 projects downward from the entire edge of the second hanging rib. And between the 1st and 2nd drooping horizontal ribs 91 and 92 is connected by the some drooping vertical ribs 93, 93, 96, 96 projected and formed in the recessed part back surface 40X. A pair of hanging vertical ribs 96, 96 are disposed at both ends in the longitudinal direction of the first and second hanging horizontal ribs 91, 92, and the remaining pair of hanging vertical ribs 93, 93 are the first pair. And the second hanging horizontal ribs 91 and 92 are arranged at two positions near the center in the longitudinal direction. In addition, a pair of hanging vertical ribs 93, 93 disposed closer to the center is connected by a hanging communication rib 94 protruding from the recess back surface 40X. As shown in FIG. 9, the hanging communication rib 94 is disposed near the second hanging horizontal rib 92 between the first and second hanging horizontal ribs 91, 92, and the first and second hanging horizontal ribs are arranged. The ribs 91 and 92 are thinner than the first and second suspended horizontal ribs 91 and 92, and the amount of protrusion from the recess rear surface 40 </ b> X is smaller. Further, the entire edge of the lower end surface of the first hanging horizontal rib 91 on the side opposite to the second hanging horizontal rib 92 is rounded.

  As shown in FIG. 6A, a first lock member insertion hole 46 is formed through the corner portion of the first hanging horizontal rib 91 and the second horizontal rib 40D. The first lock member insertion hole 46 is disposed at the center in the lateral direction of the lower end recess 40R, and, as shown in FIG. 9, the first hanging horizontal rib 91 slightly slightly with respect to the hanging communication rib 94 of the second horizontal rib 40D. It forms from the position away from the side to the upper end position of the first hanging horizontal rib 91. Then, when the rising side wall 40 is set in the standing posture, the first lock member insertion hole 46 and the second lock member insertion hole 14 of the bottom base 11 face each other in the vertical direction.

  As shown in FIG. 6A, a pair of first engaging ribs 40E, 40E are bent upward in a crank shape at both side portions of the lower end recess 40R to form a pair of protrusion engaging recesses 40N. , 40N are formed. A pair of vertical ribs 40L and 40L that communicate between the second horizontal rib 40D and the first horizontal rib 40E are provided at two locations across each protrusion engaging recess 40N. A pair of horizontal reinforcing ribs 95, 95 formed projecting on the outer surface of the jumping side wall 40 has a lower end portion of the hanging vertical ribs 96, 96 at both ends of the first and second hanging horizontal ribs 91, 92. It is passed between the vertical ribs 40L and 40L. In addition, the protrusion amount of the horizontal reinforcement ribs 95 and 95 from the outer surface of the jumping side wall 40 is smaller than the protrusion amount of the 1st and 2nd horizontal ribs 40E and 40D.

  A pair of engagement chambers 40M and 40M surrounded by the first horizontal rib 40E, the horizontal reinforcing rib 95, and the vertical rib 40L are communicated with the lower end recess 40R on both sides of the lower end recess 40R. Specifically, a reinforcing protrusion 97 protrudes at the edge of the main plate portion 49 of the jumping side wall 40 on the lower end concave portion 40R side so as to communicate between the first horizontal rib 40E and the horizontal reinforcing rib 95. The protruding amount of the reinforcing protrusion 97 from the main plate portion 49 is smaller than that of the first horizontal rib 40E and the horizontal reinforcing rib 95. Thereby, the engagement chamber 40M communicates with the lower end recess 40R. Then, when the jumping side wall 40 is set in the standing posture, as shown in FIG. 10, the pair of locking protrusions 11K and 11K of the bottom base 11 are brought into the pair of engaging chambers 40M and 40M of the jumping side wall 40. Be contained. As shown in FIG. 6A, an engagement protrusion 40U (corresponding to the “concave engagement portion” of the present invention) is formed on the upper surface of the first horizontal rib 40E in the engagement chamber 40M. ing. As shown in FIG. 10, the engaging protrusion 40U has a rounded shape as a whole, and the side of the engaging protrusion 40U opposite to the main plate portion 49 of the jumping side wall 40 is gently inclined. ing. Note that the main plate portion 49 is formed with a punching hole 49A (see FIG. 6B) at a position facing the engaging protrusion 40U. As shown in FIG. 7, a guide slope 40V is formed at the tip corner of the first horizontal rib 40E on the lower end recess 40R side.

  As shown in FIG. 5 (B), the first horizontal rib 40E is bent slightly at both ends in the lateral direction of the jumping side wall 40 so as to translate slightly upward, and both ends on the lower surface of the jumping side wall 40 A bottom raised surface 40K is formed on the bottom raised surface, and an engaging projection 40Z is formed on the bottom raised surface 40K. As shown in FIG. 11, the engaging protrusion 40 </ b> Z includes a first guide surface 48 </ b> A that gently slopes downward from the outer surface side of the jumping side wall 40 toward the inner surface side, and an inner surface side of the jumping side wall 40. A second guide surface 48B inclined steeply downward from the first guide surface 48A toward the outer surface side is provided.

  Note that the band-like region adjacent to the second horizontal rib 40D between the second bulging protrusions 42 and 42 in the main plate portion 49 bulges outward smaller than the second bulging protrusion 42 and is stepped. It is the exit part 40S. In addition, holder fixing protrusions 43 and 43 are formed to protrude outward from two positions above the protrusion engaging recesses 40N and 40N in the stepped bulging portion 40S, and the holder fixing protrusions 43 and 43 and the second horizontal The ribs 40 </ b> D face each other with a gap in the vertical direction, and as shown in FIG. 10, locking projections 43 </ b> T are formed on the lower surface of each holder fixing projection 43. A card holder (not shown) is attached to the holder fixing protrusions 43 and 43, and the card can be held between the card holder and the outer surface of the jumping side wall 40. Similarly to the upper and lower bent side walls 30 and 31, the jumping side wall 40 is also made of an opaque resin frame member 40H that constitutes the entire outer edge portion, and a colorless member that closes the inner opening of the frame member 40H. A transparent resin window plate member 40G is integrally formed.

  The description regarding the structure of the folding container 10 of this embodiment is above. Next, the effect of the folding container 10 is demonstrated. When the folding container 10 of this embodiment is not in use, the folding container 10 is folded in the order of the pair of raised side walls 40, 40 and the pair of folded side walls 30, 30, and is folded as shown in FIG. be able to. In order to change the folded container 10 from the folded state to the assembled state, the upper frame 20 is lifted away from the bottom base 11 to bring the folded side walls 30, 30 into an upright posture, and then the folded side walls 30. , 30 is turned downwardly between the two end portions of the pair 30 and 30 so as to be in a standing posture. Then, as shown in FIG. 1, the group of side hooks 34 of the bent side wall 30 engages with the connecting piece 45T of the jumping side wall 40 so that the bent side wall 30 and the jumping side wall 40 are integrated, and the folding container 10 is in an assembled state.

  At this time, between the lower end of the jumping side wall 40 and the bottom base 11, the outer edge of the bottom base 11 shown in FIG. 4A is formed in the lower end recess 40 </ b> R of the jumping side wall 40 shown in FIG. The center protrusion 11R is fitted as shown in FIGS. 8 and 9, and the pair of protrusion engaging recesses 40N and 40N of the jumping side wall 40 shown in FIG. The rectangular projections 11M and 11M of the bottom base 11 shown in FIG. Thereby, the shift | offset | difference of the left-right direction with respect to the bottom part base 11 of the jumping side wall 40 is controlled. In addition to these, locking protrusions 11K and 11K (see FIG. 4A) projecting from the outer edge central protrusion 11R on both sides of the bottom base 11 are engaged on both sides of the lower end recess 40R on the jumping side wall 40. As shown in FIG. 10, the engagement protrusions 40U on the inner surfaces of the engagement chambers 40M are engaged with the lower surface recesses 11Y of the engagement protrusions 11K as accommodated in the chambers 40M and 40M (see FIG. 6A). Thus, the inward rotation of the jumping side wall 40 is restricted. Further, the engagement protrusions 40Z (see FIG. 7) at both ends in the lateral direction of the jumping side wall 40 and the engagement recesses 11Z (see FIG. 4 (A)) of the bottom base 11 are also unevenly engaged as shown in FIG. Thus, the inward rotation of the jumping side wall 40 is restricted. In addition, the rotation to the outside of the jumping side wall 40 is regulated by the contact between the lower end portion of the jumping side wall 40 and the bottom surface surrounding wall 11S.

  Here, in order to hold the jumping side wall 40 more firmly in the standing posture, for example, a binding band (not shown) is attached to the first lock member insertion hole 46 of the jumping side wall 40 shown in FIG. It suffices to pass through the lock member insertion hole 14 and pull it sideways from the side opening 13W of the finger hanging recess 13 to bind them. At this time, the binding band is curved by sliding the tip through the first lock member insertion hole 46 and slidingly contacting the hanging communication rib 94 from obliquely above, and can be easily pulled out from the side opening 13W to the side. Thus, the attaching operation of the binding band can be easily performed.

  By the way, in order to change the folding container 10 from the assembled state to the folded state, the jumping side wall 40 is pressed or beaten from the outer surface side to engage between the engaging protrusion 40U and the lower surface recess 11Y (FIG. 10). Reference) and the engagement (see FIG. 11) between the engagement protrusion 40Z and the engagement recess 11Z are released. At that time, a large bending stress can act as a load on the lower end portion of the jumping side wall 40 due to the reaction force against the engagement release. Further, if the folding container 10 is accidentally folded while the lower end portion of the jumping side wall 40 and the bottom base 11 are connected by a binding band, the jumping side wall 40 is pressed or beaten from the outer surface side. A large tensile stress can act as a load on the central portion of the lower end portion of the upper side wall 40.

  However, in the folding container 10 of the present embodiment, the middle portion of the second horizontal rib 40D is reinforced by the first and second hanging horizontal ribs 91 and 92, the hanging vertical ribs 93 and 96, and the hanging connecting rib 94. Further, the strength reduction due to the first horizontal rib 40E being divided by the lower end recess 40R is suppressed, and the strength of the jumping side wall 40 is higher than the conventional one. Further, a pair of horizontal reinforcing ribs 95, 95 extending from the first and second suspended lateral ribs 91, 92 to both sides, the first and second suspended lateral ribs 91, 92 and their lateral portions, In this respect, the strength of the jumping side wall 40 is higher than in the prior art. Thus, the rising side wall 40 of the folding container 10 of the present embodiment can withstand the large load described above.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

(1) Although the folding container 10 of the said embodiment had the 1st and 2nd lock member insertion holes 14 and 46 for inserting a binding band, it is the 1st and 2nd lock member insertion holes. It is good also as a structure which does not have.

(2) In the folding container 10 of the above embodiment, the hanging communication rib 94 is lower and shorter and thinner than the first hanging horizontal rib 91, but the hanging communication rib 94 has the same shape as the first hanging horizontal rib. May be.

(3) The folding container 10 of the above embodiment is provided with the finger hanging recess 13 on the back surface side of the outer edge central protrusion 11R, but instead of the finger hanging recess 13, a mechanical arm is provided on the back surface side of the outer edge center protrusion 11R. It is also possible to adopt a configuration provided with a concave portion into which a finger cannot be inserted.

10 Folding container 11 Bottom base 11K Locking protrusion 11Y Lower surface recess (concave engaging part)
11R outer edge central protrusion 13W side opening 14 second lock member insertion hole 20 upper frame 30 bent side wall 31 upper bent side wall 32 lower bent side wall 34 side hook 40 jumping side wall 40D second horizontal rib 40E first horizontal rib 40M engagement chamber 40R bottom end recess 40U engagement protrusion (concave engagement portion)
40X Concave inner surface 46 First lock member insertion hole 91 First hanging horizontal rib 92 Second hanging horizontal rib 93,96 Hanging vertical rib 94 Hanging communication rib 95 Horizontal reinforcing rib

Claims (5)

The whole has a rectangular parallelepiped box shape, and a pair of jumping side walls and a pair of bent side walls are arranged opposite to each other between the bottom base constituting the bottom and the upper frame constituting the upper part,
The jumping side wall is rotatably connected to the upper frame only at the upper end, while the bent side wall is rotatably connected to the upper frame and the bottom base at both upper and lower ends. A folding container capable of folding the pair of folding side walls upward and then folding the pair of folding side walls in two;
The lower edge of the bottom base includes an outer edge central protrusion that protrudes upward from the center of the outer edge below the jumping side wall, and a lower end recess that fits the lower edge of the jumping side wall into the outer edge center protrusion. A pair of first horizontal ribs that are formed to project from the outer surface of the jumping side wall, extend in the lateral direction of the jumping side wall, and are divided by the lower end recess, and are formed to project from the outer surface of the jumping side wall. In the folding container provided with a second horizontal rib that traverses the upper end of the lower end recess and extends on both sides of the lower end recess,
The recess back surface, which is constituted by a part of the lower surface of the second horizontal rib and faces downward on the back side of the lower end recess, extends downward from the entire edge on the tip side of the second horizontal rib in the recess back surface. And a second hanging lateral rib projecting downward from the entire edge of the second horizontal rib on the base end side of the concave rear surface. Tatami container.   2. The folding container according to claim 1, wherein a plurality of hanging vertical ribs that protrude from the inner surface of the recess and communicate between the first hanging horizontal rib and the second hanging horizontal rib are provided. A drooping communication rib that communicates between a pair of adjacent drooping vertical ribs and protrudes from the back surface of the recess;
A first lock member insertion hole formed in the second horizontal rib through the first hanging horizontal rib side position from the hanging communication rib;
A second locking member insertion hole formed through the outer edge central protrusion at a position facing the first locking member insertion hole in the vertical direction;
The folding container according to claim 2, further comprising: a side opening formed on a side surface of the bottom base and opening a lower space of the outer edge central protrusion sideward.   The hanging vertical ribs are respectively disposed between both lateral ends of the first hanging horizontal rib and the second hanging horizontal rib, and a pair of extending from the lower end of the hanging vertical rib to both sides of the lower end recess. The folding container according to claim 2 or 3, wherein a horizontal reinforcing rib is integrally formed on an outer surface of the jumping side wall.   A pair of engagement chambers sandwiched between the first horizontal ribs and the horizontal reinforcing ribs on both sides of the lower end recess communicated with the lower end recess and protruded on both sides from the outer edge central protrusion. The pair of engaging protrusions can be accommodated in the pair of engaging chambers, and the concave-convex engagement is capable of engaging with the inner surface of the pair of engaging chambers and the pair of engaging protrusions. The folding container according to claim 4, further comprising a portion.